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Capacitor and switch power supply AC-DC circuit

A capacitor and circuit technology, applied in the field of capacitors and a switching power supply AC-DC circuit, can solve the problems of limited bandwidth, large size of optocouplers, slow optocoupler signal speed, etc., and achieve easy packaging, accurate constant voltage and constant current. output, achieve the effect of miniaturization

Active Publication Date: 2017-07-14
SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a capacitor and a switching power supply AC-DC circuit, which are used to solve the problem that the speed of optocoupler signal transmission in the prior art is relatively slow, which limits the corresponding bandwidth, and the volume of the optocoupler is too large to realize the isolation circuit The problem with miniaturization requirements

Method used

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  • Capacitor and switch power supply AC-DC circuit
  • Capacitor and switch power supply AC-DC circuit
  • Capacitor and switch power supply AC-DC circuit

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0053] The present invention provides a capacitor, such as figure 1 as well as figure 2 As shown, it is used in high withstand voltage circuits;

[0054] The capacitor 100 in the embodiment of the present invention is made of a silicon substrate 101, a first insulating layer 102, a metal conductive layer 103 and a substrate 104 of any lead frame in a high withstand voltage circuit; one side of the silicon substrate 101 is covered on the ...

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Abstract

The invention provides a capacitor and a switch power supply AC-DC circuit , which are applied to a high voltage-resistant circuit. The capacitor comprises a silicon substrate, a first insulation layer, a metal conductive layer and a base plate of an arbitrary lead frame in the high-voltage resistant circuit, wherein one surface of the silicon substrate covers the fist insulation layer, the metal conductive layer covers the first insulation layer, the other surface of the silicon substrate is connected with the base plate, and the thickness of the first insulation layer is determined according to a voltage-resistant impact value of the capacitor and the dielectric strength of the first insulation layer. With the capacitor provided by the embodiment of the invention, the miniature requirement of the circuit can be met.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a capacitor and a switching power supply AC-DC circuit. Background technique [0002] AC-DC conversion (AC-DC) switching power supply system converts low-frequency high-voltage alternating current (such as 220v or 110V) input on the primary control circuit side into the required DC voltage or current output on the secondary control circuit side. This system is widely used in households And industrial fields, such as LED drive, charging equipment, etc. In order to achieve precise control of the output voltage and current, or to achieve synchronous rectification, the control chip in the secondary control circuit will transmit the voltage or current signal back to the primary control circuit at high frequency. At the same time, in terms of safety requirements, power control requires absolute isolation between the input and output. [0003] In the prior art, an optocoupler is us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/64H02M7/217
CPCH01L23/642H02M7/2176H02M1/0067H01L2224/05554H01L2224/0603H01L2224/48137H01L2224/48247H01L2224/48257H01L2224/4903H01L2224/49111H01L2224/49171
Inventor 周济明
Owner SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD
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